Call Rest webservice in Ruby on Rails

Rails
1

Hi every body,

I use rest web service in my rails application for user’s
authentication (user creation, login, …)
Can someone explain me, how can i call a REST Web service (not
developped in Rails, and deployed by Tomcat) in my rails application
via POST method.

Thanks in advance for your help

2

I use the Ruby Net::HTTP library to construct requests.

Best regards,
Bill

3

I’ve just used:

data = curl -data xxx url

That doesn’t seem like the “right” way, but it works.

4

Define a class like this in your models folder

class MyUserWS < ActiveResource::Base
self.site = “http://localhost/” # point this to the location of
your web service
self.format = :json # default format is xml.
include this line if you want json
self.element_name = “users” # if your class name (MyUserWS in
this case) is different from the name of the webservice you are
calling, Mention the real name here
self.user = “[email protected]” # if your webserive need user
authentication mention user name and password
self.password = “mypassword”
end

Once you have this… you can instanciate MyUserWS as if it is a model
on local database table. You can do all activerecord operations on it
as you do on your models

Regards
Shireesh

5

On Feb 28, 8:03am, gs84 [email protected] wrote:

I use rest web service in my rails application for user’s
authentication (user creation, login, …)
Can someone explain me, how can i call a REST Web service (not
developped in Rails, and deployed by Tomcat) in my rails application
via POST method.

You should also read up on ActiveResource.

6

On 28 fv, 21:30, Bill W. [email protected] wrote:

I use the Ruby Net::HTTP library to construct requests.

Best regards,
Bill

Thanks to all for your answer.
Bill, can you show me please how you you use the NET::HTTP library to
call web service.

Because i have used the NET::HTTP libray like the following, but i
alway got 405 error and web service is not called.
I have the signup method in my user controller!

def signup
require “net/http”
require “uri”

  user= User.new(params[:firstname],

params[:lastname],params[:password],params[:mobilenumber],params[:email])
uri = URI.parse(“myWebServiceUrl”)
http = Net::HTTP.new(uri.host, uri.port)

  request = Net::HTTP::Post.new(uri.request_uri)
  request.set_form_data({ "password" =>

“MyPassword”,“firstname”=>“yourFirstname”, “lastname”=>“yourLatsname”,
“email”=>“[email protected]”,“mobilenumber”=>“1234567890”})
response, data = http.request(request)

  render :text => "#{data}"

end

Thanks for your help

7

Hi,

To send data from an action I do this:

def send_mydata
…
uri = URI.parse(link)
net_http = Net::HTTP.new(uri.host, uri.port)
net_http.open_timeout = timeout
net_http.read_timeout = timeout
net_http.use_ssl = (uri.scheme == ‘https’)# enable SSL/TLS
if net_http.use_ssl?
net_http.cert =
OpenSSL::X509::Certificate.new(File.read(cert_path))
net_http.key = OpenSSL::PKey::RSA.new(File.read(key_path))
net_http.verify_mode = OpenSSL::SSL::VERIFY_NONE
end

self.response_body = proc do |response, output|
net_http.start do |http|
http.request_get(uri.request_uri()) do |res|
case res
when Net::HTTPSuccess then
res.read_body do |segment|
response.write(segment)
end
when Net::HTTPRedirection then
response.close() unless response.closed?
return
else
raise “Net::HTTPResponse error: #{res.message.to_s()}”
end
end
end
end
end

8

Hi,

I never tried this, but it should be something like this:

required_parameters = [“param1=value1”, “param2=value2”]
…
self.response_body = proc do |response, output|
net_http.start do |http|
http.get(uri.path + ‘?’ + required_parameters.join(’&’))
case res
…

Maybe, you need to “escape” the required parameters.

Cheers.

9

On 1 mar, 19:32, exequiel [email protected] wrote:

net_http.use_ssl = (uri.scheme == ‘https’)# enable SSL/TLS
case res
end
end
end
end

Hi,
How can i set parameters in this case?

Thanks

10

Allow me to second the recommendation to read up on ActiveResource -
this is
exactly what it’s designed for, and in fact if you’re also developing
the
ReST API, you can use ActiveResource to impose convention (over
configuration) in your API - plus you’ll have a nice test rig when
you’re
done.

Only issue is whether enough people in the Ruby community see AR this
way
and whether it will continue to be maintained.

m